Gun perforator



- 1945' G. F. TURECHEYK" GUN 'PEREORATOR 2 SheetsS heet 1 7 Filed Nov. 24, 1943 2 cam s mmvroa Grazer/FERRY ATTORNEY Patented Jan. 1, 1946 assists GUN rnnrona'ron.

George F. Tnrechek, Los Angeles, Calif. assignor to Lane-Wells Company, Los Angeles, Calif., a

corporation of Delaware Application November 24, 1943, serial No. 511,157

14 Ciaims- (Cl. 164-05) I My invention relates to gun perforators, that is, to devices adapted to be lowered in'a well casing for the purpose offiring bullets therethrough in order to form passages for the entrance of oil or connate fluids, Among the objects oi my invention are:

First, to provide a gun perforator wherein the gun units are set oil by a concussive wave produced by a high speed fuse cord which extends in proximity to percussion caps incorporated in the gun units;

Second, to provide a gun perforator wherein a plurality of gun units, each complete in itself,

are interchangeably and removably mounted in Figure 6. is a fragmentary Figure 7 is an enlarged iragmentary longitudinal sectional view thereof.

A gun carrier l is provided which is in the iorm of a cylindrical member provided with large transverse bores 2. Each transverse bore is provided with counterbores 3 at its extremities and is adapted to receive a gun unit 4, Each gun unit includes a gun body I having a flanged at one end and threaded at the other end to receive a ring nut l. The flange land ring nut Int in the counterbores 8 to secure each gun unit in its transverse bore 2.

Each gun body ii is provided with a socket extending therein, the inner end oi? which forms a gun chamber 8 and the outer end thereof is enlarged or counterbored and internally threaded toreceive a gun barrel 9. The gun barrel 9 is provided with a central gun bore 10., A cartridge eter oi the gun perforator, so that the maximum impetus may be imparted to the bullet;

Fifth, to provide a gun perioi'atcr having a substantial wall thickness around its cartridge chambers whereby the inserted cartridges may have high powder loading densities;

Sixth, to providers gun perforator which may in one form utilize many of the parts of 'a standard gun periorator now in use, such as that dieclosed in the following patents: No. 2,029,454, W. T. Wells, issued February 4, 1936; No. 2,062,974, W. G. Lane, issued December 1, 1936: No.

2,062,975, W. G. Lane, issued December 1, 19.38;.

No. 2,092,294, G. F. Turechek, issued September 'i, 1937; thereby providing, in efl'ect, means whereby such a standard electrically fired gun pertorator may be converted to a fuse-ignited gun perioa gun perforator incorporatingone form of my invention;

Figure 2 is an enlarged transverse sectional view thereof taken through 2-2 of Figure 1;

Figure 31s a partial elevational, partial sectional view of the cartridge case taken through 3-40! Figure 2;

Figure 4 is a side elevational view of the cartridge case;

Figure 5 is a transverse sectional view similar to Figure 2, showing a modified form of my gun periorator;

H fits in the cartridge chamber 8 The cartridge ll may be die-cast from metal or formed or plastic having good impact characteristics and capable oi withstanding oil well temperatures.

- The cartridge ii is in the form of a cylinder with a hemispherical inner or closed end and is provided with a ilange I: at its outer oropen end. The open end of the cartridge i i receives a cover it. The gun bore l0 receives a bullet H which. is provided with a retainer flange i5 and the inner end of the gun bore is chamfered to accommodate the flange it, so that the bullet is held at the inner end of the gun bore adjacent the cover it.

One side of the cartridge H is provided with a boss it having a lateral opening therethrough which receives a percussion element or cap H which may be similar to the type provided in conventional rifle cartridges.

The gunbody-I is provided with a firing pin bore It which registers with th'e percussion element ii and receives aflring pin it. The gun means 2 may be provided in the gun carrier and th several gun units.

If it is desired to arrange the gun units so that partial elevational. partial sectional view of another form of my gun perimeter: and

they are directed alternately in opposite direc-. tions. two ignition channels 29 may be provided along opposite sides, each channel and its fuse servicing alternate gun. units. In the structure shown the axes of the several transverse bores 2 occupy a. common plane, but it should be noted that the axes of the. transverse bores may be spirally arranged so that the holes mode by the bullets when the gun perforstor is iired form a spiral pattern. r

the ignition fuse or fuses, as the case may be, are connected with suitable ignition means losated within the upper end of the gun carrier. The gun carrier is suitably supported by a cable head 25 and suspended from a conductor core cable 28 which, in addition to supporting the gun ports-rotor, supplies electrical current to the ignition squib 'A, indicated diagrammatically and by dotted lines in Fig- 6. The squib may be the convcntional electric squib commercially used to nre the type c! ignition fuse hereinafter described.

. The ignition fuse is the instantaneous burning type such as Primocordfl Prlmacord has an explosive core of Pentoerythrltetetranitrate (PETN) and burns at the rate of about 20,250 feet per second, producing a substantial concussive wave of short duration. This concussive wave ha been found suficlent to drive a firing pin uch as illustrated against is per .issicn element similar to the percussion cap used in rifle cartridges with sufllcicnt force to set 011' the percussion element. This force is suflicient to set vo! the percussion element when the gun perforator is fired in air. It will be noted, however. thatliquid is free to enter the-ignition channel and'ignition port, consequently. when the gun perforate: is and under In th 'construction 5 the gun carrier Si is constructed similarly to, that shown in Figure 1, in that it is p o ided with transverse bores 32. The extremities of the transverse bores of several ing member to exclude entrance of fluid into the csrtridge chamber.

The gun body is provided with a longitudinal ignition bore 48 which intersects the transverse bores 32 substantially tangentially. The longitudinal bore receives an ignition fuse l5 and the portions thereof exposed in the transverse bores register with the firing disks 41. If it is desired to alternate the direction of the Sim units, two such longitudinal bores and ignition fuses may be provided as indicated in Figure 5. While the longitudinal bores guide and support the ignition fuses, sdditional clips ill may be provided, as shown in Figure 5.

-The gun perforator illustrated in Figure 5 cpcrates essentially the same as that illustrated in Figure 2. In both structures, whether the gun perforator is in air or submerged in liquid. the

concussive force produced upon firing the ignition caused to lire virtually simultaneously. All of the gununitsmaybenred at once oriftwocords are provided, as shown, each corresponding act of gun unitsmay be fired separately.

Reference is now directed to Figures 6 and 'L' vThe mechanical aspects of the gun ocnstruimcn herein illustrated are in many respects similar to the electrically fired gun perforotor disclosed in the 'h'ereinbefore mentioned patents, but cperates in a substantially diiferent manner. In this construction a gun carrier .II. is provided with a-series of laterally directed bores I2 which do not pierce through the gun carrier and preferably face alternately in opposite directions. The bores 82 are connected serially y passages I located along the longitudinal axis of the carrier.

to severslgun carriers may be Joined together end to end by screw-threaded connections.

Each bore-l2 is provided with a, screw-threaded portion which receives a gun unit ll. Each gun unit includes a gun. chamber block 86. Coasting gaskets UI. Cup-shaped clearance chambers ll 32 are counter-bored to a greater depththan the transferee bores 2. Each transverse bore it .receives a gun unit 38 which includes a cylindrical un body 84 of slensth sufllcient to fit within th projected area of the gun carrier. Each gun outer end of the socket is enlarged .and internally threaded to receive a barrel ll having! bore 42 therein. The gun bore receives cbulletll which is to a sheen-dish as adopted to be clamped between the gun and the inner end or the gun barrel. The sheer disk may also serve to seal the cartridge chamber.

7. The gun bodyisprovidedwith a lateral i l which is enlarged at its outer end to receive a "internally-threaded to receive a gun barrel .Ii.

' which receives an explosive cartridge '40. The

are formed between the gun blocks and bores II,

1 these clearance chambers 88 communicating with the passages it.

Each gun block has a socket therein, the inner end of which forms a cartridge chamber I. The

outer end of the gun block socket is enlarged and A gasket "Ii seals the connection between each gun barrel and gun block. Each gun bur-rel is provided with; centrally positioned gun bore 12,

outer end of which is closed by a. cap 18. A bullet M fits within the gun bore and is held at v thelnner end thereof by a, shear disk II which covers the cartridge chamber 09. The cartridge ll comprises a metal sh'ell Ila which is enclosed in an envelope of insulation Nb and which conpercussion element or cap ll. end" of the port ll is clossdbys firing disk]! having a proiection'adapted to set oil the percussion ole meat when the disk is driven inwardly there- Theflringwmdscsomssonsl? tains sn'explosive charge. fitted in the bass or inner endcf the. cartridge 16 is a percussion eloment 11. The gun block is provided with asmallgbore ccmmmdceting from its inner cartridge chamber in registry with the porous? lion element. This bore is fitted with s firing.

plli ll.

, s fuse cord is is threaded through the eon- 'nectlng II and around the gun block through the clearanc chambers I. As in the prsviouslydescribedstructuregthefusecordisa i'sst burning fusecord of the two known coming ignition cord common to said gun units and passing in proximity to said strikers.

9. A gunperf orator comprising: a gun carrierhaving a plurality of laterally directed bores extending partway therethrough and longitudinally directed connecting passages; a gun unit fitting each or said bores, their-inner ends cleararoundsaldgununit.

passages connecting said clearance spaces; each gun unit including an explosive cartridge; a detonator for said cartridge and nring means for said detonstor, said firing nieans being exposed ,to said and means for gen era-ting a: momentary pressure insaid passages and clearance spacesior driving the firing means of said genome ag inst an detonators. I

11. A gun periorator'coniprlsing: a gun barrel havingaboreiorcontsiningaprciectiieanda "propulsive powder "charge; apercussion'cap i'or igniting said powder-chant; an explosive element positioned inproxiinityto said percussion cap and of such character as to explode withsufllcient violence to detonate the said percussion cap by the pressure created; and means for exploding said explosive element.

12. A gun periorator comprising-fa carrier;- a

plurality of independent gun'unitsremovably ll explosion of said pioding said explosive element;

inounted in said carrier. each sun unit including a gun barrel having a bore for containing a proiectiie and a propulsive cl'iarge and a percussion cap for igniting said propulsive charge: a continuous explosive element extending along said carrier in proximity to said percussion caps in said gun units, exposed to fluid pressure external to said perforator and of such character as to explode with suiilcient violence to detonate the percussion rape by the pressure created; and

means for exploding said explosive element.

13. A gun periorator comprisingz-a gun unit .10: containing a proiectile, a chamber associated with said unit for confining a propulsive charge for said projectile, and a percussion cap for-igniting said propulsive charge; an explosiv'e'eleme'nt positioned in proximity tosaid percussion cap and oisuch character as to explode with sumcient violence to detonate said percussion cap by the ressure created through the explosion of said element, and means for exploding said explosive element.

14. A gun peri'orator comprising: a carrier I having a plurality of gun'units for containing projectiles, each gun unit having associated therewith a chamber for containlns a limpulsive charge for the projectile in the unit, and a per-.

cussion capiior lsniting the propuislvecharge in the unit; a continuous explosive element associated with said carrier and extending-in proximity to the percussion caps in said units. said expiosivejelementbeing at such character as to explode with sumcient violence to detonate said percussion cape by the pressure created through element, and means for ex;

ononan r. 

